I couldn’t kill any grass with clethodim

[Angus 1895]

I bought a jug of this, didn’t work. What do I need to do. Want to try it again for my irrigation ditches.

I plan on spot spraying with my quad.

Thanks

 

[SwampCat]

How long has it been? Cleth takes a LOT longer than gly. I does not work great on nwsg. It doesnt work great on mature grass. What kind of grass you trying to kill

 

[Ben.MN/WI]

Clethodim works really slowly, so give it a month before you give up on a spraying. It also works best for new, young growth so you might not see a great kill on established grasses at this point in the summer.

 

[Barndog56]

One of the three ingredients in the new residential formulation of Roundup toasts grass in just a few days.

 

[Turkey Creek]

I agree I have been on the edge of saying that a Clethodim spraying didnt work and then a week later that same spot is as brown as it can be. Sunny days tend to make the effects appear sooner as well. Cloudy days seem to slow the kill. The older the grass the higher the rate of clethodim and make sure for every ounce of Clethodim you are putting in at least a half ounce of surfactant. I like to spray when there is no dew on the grass either.

 

[Angus 1895]

How much 26.4 % per gallon?

It’s smooth brome and a “ swamp grass” that I’m not sure of specie

 

[homerj]

How much 26.4 % per gallon?

It’s smooth brome and a “ swamp grass” that I’m not sure of specie

You sure the swamp grass isn't sedge?

 

[Angus 1895]

I’m not sure of anything. I’m not very good at grass identification.

I will take some photos when I go down there in a few days.

 

[Turkey Creek]

How much 26.4 % per gallon?

It’s smooth brome and a “ swamp grass” that I’m not sure of specie

Not sure on the percent active ingredient in the brand we have. I typically use 1oz/ gallon plus the surfactant. The label calls for different rates depending on species and time of year. If I had smooth brome, it can easily be killed in late Fall with Glyphosate since it is a cool season grass, most typically all the good stuff is dormant and it’s still green.

 

[T-Max]

If your smooth brome is the same as we have, like Turkey said I have sprayed it as long as it is green which is most of the winter. I just use Gly with AMS and kill rate is 100%.


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[Angus 1895]

I was using 1/2 ounce per gallon. I will step it up and add glyphosate.

 

[Turkey Creek]

I was using 1/2 ounce per gallon. I will step it up and add glyphosate.

No need to add the Clethodim to the RoundUp if you wait to control the brome late this Fall.

 

[bigboreblr]

Look up yellow nutsedge and mace sedge. Broomsedge is another one. The leaves have steps vs flat n smooth. Where the leaf node is more distinct than grass in triangular shape.

Sedge often grows in areas where its wet long enough for most other things to die.

Sedge hunkers down in root nodes. Usually takes several whacks to destroy. Eliminating is difficult. Several hits of roundup usually puts it in the background.

Sedge is a warm season plant. Attacking early or late in the season helps alot. I use basagran, then in 2 weeks use roundup before planting in my camp foodplots. Asuming I can get there and the weather cooperates. Clethodim is useless against sedge. Adding some 2,4D can help.

My high organic matter sand at camp holds moisture well despite some sandy soils. Combine that with alot of snow melt in the spring and a bit extra rainfall from being near the great lakes, and sedge becomes king there.

Adding some alternate plant life after spraying rounds helps some too.

Sedge does not need the bacteria other plants do to survive.

Trick is to drain the roots of energy, especially before it dries out for awhile. Kill the leaves, the roots use energy to make more. kill those again, and some roots start to die. Stuff behaves alot like chufa. chufa is a sedge.

 

[homerj]

Broomsedge is a grass